Oxygen vacancies in polyimide carbon enable stable zinc-ion storage

IF 9.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Rare Metals Pub Date : 2025-02-05 DOI:10.1007/s12598-024-03084-y

Luan Fang, Li Lin, Xiaotong Wang, Shuang Liu, Wenyue Shi, Zaiyuan Le, Limin Chang, Tianhao Xu, Hairui Wang, Ping Nie

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引用次数: 0

Abstract

Aqueous zinc-ion hybrid capacitors (ZIHCs) are promising electrochemical energy storage systems with advantages of high-energy density, low cost, safety and environmental friendliness. However, application of carbon-based cathodes is limited by their low-energy density due to the lack of active sites. Herein, a chemisorption sites modulating strategy is proposed to construct nitrogen-doped polyimide carbon nanoflowers with abundant oxygen vacancies and carbonyl functionalization via high-temperature calcination and subsequent acid processing. The synergistic effect of oxygen vacancies, carbonyl groups, enhanced surface area and porous structure enables stable zinc-ion storage with high capacity. Remarkably, the carbon materials can circulate 20,000 cycles stably at a current density of 2 A·g⁻¹. After 10,000 cycles at a high rate of 3 A·g⁻¹, a capacity retention rate of 64% can still be achieved. The as-prepared ZIHCs provide an energy density of 65.61 Wh·kg⁻¹ at the power density of 197.82 W·kg⁻¹. Current research shows that polyimide-derived carbon material synthesized by acid activation provides a new idea for developing cathodes in aqueous ZIHCs.

Graphical abstract

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来源期刊

Rare Metals 工程技术-材料科学：综合

CiteScore

12.10

自引率

12.50%

发文量

2919

审稿时长

2.7 months

期刊介绍： Rare Metals is a monthly peer-reviewed journal published by the Nonferrous Metals Society of China. It serves as a platform for engineers and scientists to communicate and disseminate original research articles in the field of rare metals. The journal focuses on a wide range of topics including metallurgy, processing, and determination of rare metals. Additionally, it showcases the application of rare metals in advanced materials such as superconductors, semiconductors, composites, and ceramics.